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Record Details

Record 10 of 45686
Resonant Compton cooling and annihilation line production in gamma-ray bursts
External Online Source: doi:10.1086/171017
Author and Affiliation:
Preece, R. D.(NASA Marshall Space Flight Center, Huntsville, AL, United States)
Harding, A. K.(NASA Goddard Space Flight Center, Greenbelt, MD, United States)
Abstract: Attention is given to a synchrotron self-Compton emission model for gamma-ray bursts which produces narrow annihilation features for a variety of field strengths, primary electron injection energies, and injection rates. In this model, primary electrons are injected and cooled by synchrotron emission in a strong, homogeneous magnetic field, resulting in a pair cascade. Multiple resonant scattering with cyclotron photons efficiently traps and cools pairs in the ground state to an average energy where the Compton energy loss rate is zero, which is in agreement with previous estimates of a Compton temperature. The particle distributions in the ground state are determined by numerically solving the Fokker-Planck equation in the steady state. In the case of isotropic injection of primary electrons, a significant narrow-line feature appears in the overall emission. In the case of beamed injection, the annihilation line is broadened to the extent that it would not be observable.
Publication Date: Feb 10, 1992
Document ID:
19920040734
(Acquired Nov 22, 1995)
Accession Number: 92A23358
Subject Category: SPACE RADIATION
Document Type: Journal Article
Publication Information: Astrophysical Journal, Part 1 (ISSN 0004-637X); 386; 308-324
Publisher Information: United States
Organization Source: NASA Marshall Space Flight Center; Huntsville, AL, United States
NASA Goddard Space Flight Center; Greenbelt, MD, United States
Description: 17p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright
NASA Terms: ANNIHILATION REACTIONS; COMPTON EFFECT; GAMMA RAY BURSTS; LINE SPECTRA; ASTRONOMICAL MODELS; ASTRONOMICAL SPECTROSCOPY; COMPUTATIONAL ASTROPHYSICS; ELECTRON DISTRIBUTION; PAIR PRODUCTION; SCATTERING CROSS SECTIONS
Imprint And Other Notes: Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 386, Feb. 10, 1992, p. 308-324.
Availability Source: Other Sources
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